Selective solid–liquid extraction of cations using solid‐phase polyamides with crown ether moieties as cation host units

Abstract

This work describes the interaction of alkaline, alkaline earth, transition metal, heavy metal, and lanthanide cations from nitrate solutions with synthetic polyamides. The polyamides have pendant structures acting as cation host moieties. The host subgroups are benzo-12-crown-4, benzo-15-crown-5, benzo-18-crown-6, and the three dipodal counterparts of the three benzo-crown units. This interaction has been analyzed in terms of competitive polyamide solid-phase extraction of nitrate cations from aqueous or acetronitrile solutions. The solid-phase extraction of water or acetonitrile solutions of alkaline, alkaline earth, transition metal, heavy metal, and lanthanide ions using solid-phase polyamides is performed with a degree of selectivity. Higher selectivity is observable in the extraction of Pb(II) from a set of heavy metal ions in water and acetonitrile solutions, and the extraction of Cr(III) from a set of transition metals in acetonitrile solutions. It is a noteworthy result, which along with the reusability of the solid-phase polyamides points to potentially successful applications in the field of environmental chemistry: the decontamination and elimination of poisoning cations, the separation and modification of cation mixtures, and the development of fixed-site carrier membranes for selective transport or manufacture of cationsensitive sensors.

Thermodynamic Study and Mathematical Modeling of Adsorption of Co2+ ions on Biopolymers based of Sugarcane Bagasse

“…In recent years, the adsorption of heavy metals into solutions on natural adsorbents has a to been a considerably developed through several research works, thanks to their metal recovery efficiencies and the saving of equipment [1][2][3][4][5][6][7][8][9] .…”

Pathways of reductive 2,4‐dinitroanisole (DNAN) biotransformation in sludge

“…To overcome these problems with discrete organic or organometallic chemosensors, we propose to use polymers with receptor moieties chemically anchored to the polymer structure 10–22. Previously, this approach has been undertaken by several other research groups 10, 23–33.…”

Investigation on Self-assembled Blend Membranes of Polyethylene-block-poly(ethylene glycol)-block-polcaprolactone and Poly(styrene-block-methyl methacrylate) with Polymer/gold Nanocomposite Particles

“…Table 2 The maximum porosity was observed for PE-b-PEG-b-PCL/PS-b-MMA/AuNPs-PSNPs systems [26] . The efficiency of the membrane was outstanding for Pb 2+ the selectivity of gold nanoparticles towards the elimination of heavy metal ions [27] . …”